I just put in a reef package with blue hermits, scarlet reef hermits, and some turbo snails. I have a couple of urchins and they are always picking them up and carrying them. Do they eat them or just release them unhurt?
Urchins like to hide from the light (they are deep water dwellers) - they are just using the shells are cover. Pull them off and get some shells so the urchins can stop picking up hitch hikers.